Lock.



' J. POTAPOPF.

V LOOK.

APPLICATION FILED FEB. 14, 1913.

Patented Sept. 30, 1913.

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LOCK.

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new and useful Improvements in" Locks, of

which the followingis -a specification, ref

erence being had to the accompanying d-raw ings;

This invention relates; to new and useful improvements in l-ocks andhasfor=1ts primary object to providea lock,the tumblers and locking boltofwh-ich areboth operated;

through the medium of a compound key.

jected without changing the position of the tumblers.

A still further object of the invention is,

to provide a key, consisting of tumbler operating part, and of a lockingbolt retracting part, and to. combinesuch partsin such a manner thatthey will not interfere with each other in their operation.

A further object of the invention is the operation of a lockofthis'characterwhich will possess advantages in points. of efficiencyand durability, is inexpensive of manufacture and at the same time issimple in construction and operation. 7

With the above and other objects in view the invention consists in thenovel features of construction and the combination and arrangement ofparts hereinafter more fully described, pointed out in the claims andshown in the accompanying drawings in which, 7

Figure 1 is a front elevation of a portion of a door having theinvention applied thereto, the cover-plate being removed to disclose theinterior mechanism of the lock. Fig. 2 is a sectional view on the line22 of Fig. 1. Fig. 3 is a sectional view on the line 3-3 of Fig. 1. Fig.4; is a detail perspective view of the combined key.

Referring more particularly to the drawings 1 indicates the lock casing,which may be of any suitable shape, but preferably of a rectangular formas shown in the drawings, and 2 indicates the cover-plate thereof, bythe removal of which, access may be had to the interior mechanism of thelock. The

Patentedsept. 30, 119 1 3..

h pucauaa filed' February 14,1913. I serial: 1101 248,446;

ll'ock may be attached to the inner side of the door as shown in Fig. 1,or may be placed into a mortise formed in the door.

Arranged within the casing and adapted to entirely fill thesame are theblocks 3 and 4:, which are provided on one side with a longitudinalgroove 5, adapted for the reception of the-locking bolt 6. Formed in andarranged at one end thereof, is the recess' 7, saldrecess extendi'nginwardly and shallow recess 8. Opening into the recess 8 gis thesemi-circular recess 9, which-com- Another object of the invention is topro vide a lock of this character, the locking bolt of which may beretracted and prog municat'es with theusua-li key-hole 10.

Secured, to one side of the casing and ex- Etendfing'; inwardly in therecess 7 is a spacgi'ng block- 11, adapted to be arranged bej tween thesliding tumblers 12, said tumblersbeing arranged upon each side of thespacing block and disposed between the ends of springs. 14:, which areadapted to normally .hold the tumblers: into engagement with the 5locking bolt 6. The locking bolt 6, is provided on one of itslongitudinal edges with the spaced recesses 15 adapted to receive thebeveled ends 16 of the tumblers 12 to hold the locking bolt in itsprojected position. Secured to the inner ends of the tumblers 12 is anactuating plate 17, which is beveled ofl on one of its edges to form anengaging surface 18.

In Fig. 4 is shown the combined key which comprises the main key 19which consists of the stem 20 having a bit 21 formed upon one end and ahandle member formed on the other end. Slidably mounted upon the stem 20is a sleeve 23 which is provided at one end with a bit 24 and having athumb plate 25 formed upon the other end whereby the same may be easilymanipulated.

In Fig. 1 I have shown the lock applied to the inner side of the door,in order to unlock the same, the main key 19 is inserted in the key-holeand passed through until the bit 21 is arranged in the recess 9. The

key is then turned, the bit 21 engaging the one of the longitudinaledges of the blocks,

terminatin'ginto a substantially rectangular surface 18 of the plate 17-and forcing the tumblers 12 out of the recesses 15. The sleeve 23 isthen inserted within the key opening, until the bit 24 is disposed abovethe locking bolt 6. The sleeve is then turned, until the bit 24: engagesin one of the spaced recesses 26 formed in the locking bolt, the turningmovement of the sleeve forcing the locking bolt inwardly, a second turnbeing necessary to retract the bolt so that its outer endis disengagedfrom the keeper 27, which is secured to the jamb of the door. In orderto lock the door from the inside the operation as above described issimply reversed.

In order to unlock the door from the outside, the key 19 is inserted inthe casing until the bit 21 is disposed above the locking bolt, thesleeve 23 is then inserted until the bit 24 engages with the surface 18of the plate 17. The sleeve 23 is then turned, the bit 24 engaging theplate 17 to force the tumblers 12 out of the recesses 15, the key isthen turned, the bit 21 engaging in the recesses 26 to retract thelocking bolt, said key being turned twice around to entirely disengagethe locking bolt from the keeper and to retract said bolt within thecasing. It will be seen that when the locking bolt is in its projectedposition the inner ends of the tumblers 12 will be disposed in therecesses and held securely in place by the tension of the springs 14.

While I have shown and described the preferred form of my invention, itwill be obvious that various changes in the details of construction inthe portions may be resorted to for successfully carrying my inventioninto practice without sacrificing any of the novel features or departingfrom the scope thereof.

What I claim is A lock of the class described including a casing, alocking bolt arranged within said casing for sliding movement, blocksdisposed within the casin and having longitudinal rooves formed thereinto receive the locking bolt, said locking bolt being provided upon itslongitudinal edges'with spaced recesses, said blocks being provided attheir abutting ends with inwardly extending recesses and furtherprovided with a shallow recess communicating with the first recess, aspacing block secured to one side of the casing and arranged within saidrecesses, said spacing block having spaced openings formed therein,sliding tumblers disposed upon each side of said spacing block andhaving beveled ends adapted to engage within the recesses in the lockingbolt, springs having their intermediate portions arranged in theopenings in the spacing block and their ends engaging the ends of thetumblers, an actuating plate connecting the inner ends of said tumblersand disposed in the shallowlrecess, one edge of said actuating platebeing beveled off to provide an engaging surface and means en gagingsaid plate to disengagethe tumblers from the locking bolt and meanscooperating with the first means to actuate the locking 7 bolt. 1

In testimony whereofI hereunto aiiiX my signature in thepresence of twowitnesses.

, JOHN POTAPOFF. NVitnesses M. F. REIBIN,

E. N. VERIGINV Copies of this patent may be obtained for five centseach, by addressing the Commissioner of Patents, Washington, D. G.

